A steam engine has a boiler that operates at 500K. The energy from the boiler changes water to steam, which drives the piston. THe temperature of the exhaust is that of the outside air, 300K. You may assume an ideal engine.
a) what is the engine's efficiency?
b) If 3.5E3 J of energy is delivered to the engine (QH) during one cycle, find the work done by the engine.
2007-12-11 03:42:40 · 1 answers · asked by rachhar123 1 in Science & Mathematics ➔ Physics
An ideal engine is also called a Carnot engine.
The efficiency of this type of engine is
e = 1 - Tc/Th or equivalently (Th-Tc)/Th
where Tc and Th are the temperatures of the cold and hot reservoirs respectively.
The efficiency gives the fraction of the input energy that is converted to work. So the work will be
w = e E . Where E is the enegy delivered.
2007-12-11 05:24:01 · answer #1 · answered by Demiurge42 7 · 1⤊ 0⤋